Thread cutting and clamping mechanism



Aug. 21, 1951 J. J. STANLEY 2,565,405

THREAD CUTTING AND CLAMPING MECHANISM INVENTUR. JOHN J. STANLEY ATTORNEY Aug' 21, 1951 J. J. STANLEY 2,565,405

THREAD CUTTING AND CLAMPING MECHANISM Filed March 23, 1950 5 SheetsrSheet 2 55 i5' A' 75 a1 7a 66 75 8O f7 76 a2 l 64 67 LA 7 15a 5 65 IU I 57 a 1 l 118 92 100 M0 59 112 T m 1 sa f u? ua 157140/ .20 I A 52110 N [9 k/w F' 5 E l g n INVENTOR.

JOHN J. STANLEY ATTORNEY Aug. 2l, 1951 J. J. STANLEY 2,565,405

' THREAD CUTTING AND CLAMPING MECHANISM Filed March 23, 1950 3 Sheets-Sheet 3 INVENTOR. JOHN J. STANLEY ATTORNEY u E v BY Patented Aug. 2l, 1951 THREAD CUTTING AND CLAMPING MEcnnNlsM John J. Stanley, Packanack Lake, N. J., assignor, by mesne assignments, to Steel and Alloy Tank Company, Newark, N.1J a corporation of New Jersey Application March 23, 1950, Serial No. 151,417

15 Claims.

The present invention relates to a thread cutting and clamping mechanism of the type employed in a loom in connection with a filling transfer motion for cutting the filling end on an exhausted bobbin prior to a transfer operation and for clamping the severed filling end extending to the cloth.

In looms of the general ily shuttle type, when replenishing of filling is indicated, the outgoing or spent filling end extends from the cloth selva-ge through the eye of the shuttle to the bobbin contained in the shuttle. When the fresh bobbin of filling is inserted in the shuttle, not only must the spent bobbin be removed, but the shuttle eye must be cleared of the spent filling to allow the filling from the fresh bobbin to be threaded properly in said eye. To accomplish this, the lilling vextending from the selvage of the cloth must be cut as closely as possible to the shuttle, so that the spent bobbin, in being ejected, will draw the short length of filling left extending from the shuttle through the shuttle eye, leaving said shuttle eye entirely clear and free. The spent filling end is not only severed near the shuttle, but is clamped near the severed end, so that it may be withdrawn out of the range of the weaving instrumentalities simultaneously with the transfer operation and held in this withdrawn position until the temple cutter cuts it close to the selvage. Usually the shuttle with the new bobbin makes at least two traverses before the temple cutter severs the spent end. There is accordingly provided in such looms a movable blade carrier having severing and clamping blades mounted in front of the shuttle box at the transfer side of the loom. These blades are moved by the carrier to filling receiving position, i. e. rearwardly of the loom toward the shuttle box, prior to each transfer operation and are Withdrawn forwardly from such position simultaneously with the transfer operation.

One object of the present invention is to provide a new and improved thread cutting and clamping mechanism for a loom which is more positive in action than prior art mechanisms, which is comparatively simple in construction and highly effective in operation and which lends itself to various adjustments by simple manipulation. Various other objects of the invention will be apparent from the following particular description and from an inspectionof the accompanying drawings, in which:

Fig. 1 is a top plan View of the filling transfer side of a loom and shows a thread cutting and clamping mechanism embodying the present invention and indicated in operative position after initiation of transfer;

Fig. 2 is a detail view of a part of the thread cutting and clamping mechanism taken approximately along the lines 2-2 of Fig. l;

Fig. 3 is a section of the thread cutting and clamping mechanism taken approximately along the lines 3 3 of Fig. 1, but showing this mechanism in inoperative position prior to initiation of transfer;

Fig. 4 is a section similar to that of Fig. 3, but shows the mechanism after transfer has been initiated and after the cutting and clamping blades have been moved rearwardly of the loom and into open operative position in the shuttle box;

Fig. 5 is a section similar to that of Fig. 3, but shows said mechanism after the-cutting and clamping blades have been closed and after completion of transfer;

Fig. 6 is a section of the thread cutting and clamping mechanism taken approximately along the lines ifi-6 of Fig. 1 and shows the mechanism after transfer has been initiated and While the cutting and clamping blades are being moved rearwardly of the loom towards the lay and are in open operative position and in a phase just prior to that shown in Fig. 4;

Fig. 7 is a detail view of a part of the thread cutting and clamping mechanism taken approximately along the lines 'l-'l of Fig. 6;

Fig. 8 is a detail section of the pivot mounting for theblade opening cam taken along the lines 8-3 of Fig. 6;

Fig. 9 is a section similar to that of Fig. 6,

.but shows the mechanism after the cutting and clamping blades have been closed and in a phase later than that shown in Fig. 5;

Fig. l0 is a detail View of the cutting and clamping blades in closed position taken approximately along the lines I -lll of Fig. 9;

Fig. 11 is a detail view of the cutting and clamping blades in closed position taken approximately along the lines II-Il of Fig. 10; and

Fig. 12 is a detail View of the cutting and clamping blades in closed position taken approximately along the lines I 2-I2 of Fig. l0.

Referring to the drawings, and especially to Fig. 1, the loom to which the present invention is applicable is shown for the purposes of illustration comprising a loom frame having a right loomside Ill with parallel upright frame webs ll and l2 interconnected and braced in any suitable manner. Supported on this right loomside is a rotatable hopper or magazine` (not shown) of The front plate 22 of the shuttle box I8 has an opening 23 located adjacent to the shuttle eye 24 when the shuttle 2| is properly boxed in the shuttle box I8. The opening 23 extends along the front shuttle box plate 22, slopes upwardly towards the left side of the loom and is open at its left hand end to permit the severed clamped filling thread to be cleared from the shuttle box I8,as said box moves rearwardly with the lay I'I after thread severing and clamping operations.

The shuttle 2| has the usual cut-away portion or slot 25 in the front wall thereof adapted to be in partial registry with the opening 23 of the front shuttle box plate 22, when the shuttle is properly boxed so that when the thread cutter is in its operative rearward position and the cutting and clamping blades (to be described) extend through said opening and through said slot and are open, the outgoing filling end will rest between said blades ready to be cut and clamped.

The operation of the transfer mechanism is controlled by a starting rod 3D suitably supported near one end in journals 3| on the right loomside I and near the other end in journals (not shown) on the left loomside or on the forward side of the breast beam (not shown). The transfer mechanism with its starting rod 30 may be, as far as certain aspects of the invention are concerned, of the usual or of any suitable type.

Whenever the substantial exhaustion of the lling is indicated by a feeler mechanism (not shown), a partial revolution is given to the starting rod 30 to set the transfer mechanism for operation.

The operation ofthe transfer mechanism is initiated by the starting rod 30, but is controlled by a shuttle feeler operatable to revoke automatically. the call for transfer when the shuttle 2| is not in proper position in the shuttle box I8 for bobbin transfer. The shuttle feeler for that purpose is of the type shown in copending application Serial No. 147,482, led March 3, 1950, and comprises a tubular guide 4D secured to a bracket (not shown) affixed to and depending from the base I5 of the hopper stand. Slidable in the guide 40 is a feeler plunger 4I carrying a feeler tip 42. A pin 43 extending through the feeler plunger 4| and through diametrically opposed elongated slots (not shown) in the guide 4|] is engaged at its outer projecting ends by the forked prongs of a shipper arm 45 affixed to a suitably journalled pivot shaft 45. The shipper arm 45 is operated from starting rod 30 upon receiving a call for transfer, to move the shuttl-e feeler tip 42 into position just ahead of the tip of the properly boxed shuttle 2|. If the shuttle 2| is not properly boxed, the feeler tip 42 will engageV the shuttle and will be moved forwardly of the loom by the forward movement of the lay I'I, thereby revoking the call for transfer.

The shipper arm 45 is operated from the starting rod, 30, and for that purpose, said starting rod has rigidly connected thereto a crank arm-50 pivotally connected at its outer end to one end of a link 5|, the other end of said link being connected at 52 to said shipper arm. For effecting protection through operation of the shuttle feeler, the link 5| is of the giveway or lost motion type to transmit motion to the shipper arm 45 about its pivot support when transfer is indicated and the starting rod 3|) has been partially rotated and to yield without disturbing the rotative position of said starting rod when protection is indicated by the improper boxing of the shuttle 2 I.

'For effecting transfer of-the lowermost filled bobbin on the hopper, there is provided a main transferrer (not shown) comprising a pivoted arm and a shoe or-head on said arm adapted to engage the heelor butt of said bobbin and push said bobbin into the shuttle 2| for transfer action. There is also provided an auxiliary transferrer comprising an arm (not shown) having a head adapted to engage the filled bobbin to be transferred near its tip and operatable in unison with the main transfer arm to effect ejection of the bobbin free from tilting. The auxiliary transfer arm is secured to and transversely of a hollow shaft (not shown) mounted for rocking movement on a hollow bearing or axle rod 53 afxed at one end to a support 54 integral or otherwise rigid with the hopper stand base I5. The hollow shaft is rocked in unison with the main transfer arm to effect simultaneous bobbin transfer operations of the main and auxiliary transferrers. This construction forms per seno part of the present invention and is fully disclosedand claimed in copending application Serial No. 147,482, filed March 3, 1950.

The cantilever rod 53 extends substantially parallel to the breast beam (not shown) or lay and at its outer unsupported end 55 carries the thread cutter 56. This thread cutter comprises a blade carrier 51 located in front of the shuttle boxY I8 and directed for forward and rearward movement by a guide 58 having a split cla-mp 6| adjustably attached to the hollow axle rod 53 by a stud 62. The guide 58 has a T-slot 63 along its lower section and the blade carrier 5l' has a corresponding T-head 54 at its upper section extending with a slide nt into said slot.

Upon the initiation of transfer, the blade carrier 5l is moved rearwardly through the starting rod 30 into operative position at the same time the shuttle feeler plunger 4I is moved rearwardly by said starting rod into shuttle feeler position. To that end, the pivotshaft 46 to which the shipper arm 45 for operating the feeler .plunger 4| is aiiixed projects beyond the side of said shipper arm and has pinned or otherwise afxed to the projecting part of said shaft one end of an arm 55 (Figs. 1 and 2), the other end being secured to one end of a push-pull cable 66. The cable 66 extends through a tubular flexible casing 61 and at its other end is secured to the slidable blade carrier 5l by spring-connection to be described. In this manner, when the starting rod 30 is rotated partially, the resulting angular movement of the shipper arm 45 causes lengthwise movement of the cable 66 and the corresponding movement of the blade carrier 5'I rearwardly towards the shuttle box I8 and into operative position.

The cable casing 51 is secured at one end on the hopper stand I4 by means of a clamping nipple l held in position by means of lock nuts 'I2 on a flange I forming part of said stand and is secured at its other end to the blade carrier guide 53 in any suitable'manner, as for example by means of la clamping-collar 1,3.- The cable casing servesnot only. to protect fthe cableBI therein, but as a guide forsaid cable inits'pushpull operations. I y. For-securing one end ofjthe cable 66to the blade carrier 51, said cableat-thislend,extends into a' hollow 15 (Figs. 23, 4 and 5) inthe guide 58 yand has secured thereto an anchor rod 1 6. One-,end section 11 of the `anchor rod 16 is hollow to embracethe end section of the cable 66 with `a gripping fit, andthe other end is solid and of reduced diameter and passes with a slide nt through arlug `1S integraler otherwise rigid with the guide 53. A collar 80 on the cable 66 serves as an. abutment for one end of a coil spring 8| encircling the anchor rod 15, the other end bearing against one sideof the lug 18\.` Nuts 82 threaded on the outer endvof theanchor rod 10 and bearing against the'other side of the lug 18 limit. thermovement offsaid rod endwisein one direction against the expansive action of the coil spring 8|. f

The blade carrier 5'! ixedly mounts a pair of spaced blades 9G and 5I and movably supports a blade 92 therebetween. .The fixed blade 90 is a thread cutting blade of rigid material such as metal and has a cutting edge Q3 slanting upwardly and rearwardly and bevelled downwardly towards the movable blade 92, as shown in Figs. 10, l1 and 12. The other fixed blade 9| is a thread clamping blade and comprises a board or layer 94 of fiber or similarcomparatively soft material to in positionof the cam supportingplate |I2, the sidewall II3 of the guide 58 is provided with a substantially horizontal slot IIB through which the plate mounting bolts II4 pass. The bolts I I 4 are desirably of the carriage type with Shanks of square cross-section retained in the slotN IIB in the side wall II3of the guide 5B, to prevent the turning of said bolts when the nuts are screwed thereon. l

The tail end of the movable blade 92 carries an axle pin I I9 on which is rotatably supported a cam follower roller II1 adapted to ride over lthe blade operating cams IIOand III.

The blade opening cam IIO is disposed below the course of slide travel of the movable blade 9,2 and is supported on a pin IIB tofswing freely therefrom under the action of gravity and the action of the follower roller II1. To permit the blade opening cam |00 to be adjusted vertically independently of the blade closing cam III, the pin I I8 is in the form of an eccentric bolt, as shown-in Fig. 8, and has a slotted head |20 slotted to receive a turning tool, an end journal I2I havprevent shearing'of the yarn, secured to a backing plate 95 made of rigid material such. as metal. The movable blade 92 made of rigid material such as metal has a square edge 95 and cooperates with the fixed blade 90 to cut the yarn and cooperates with the other fixed blade 9| to clamp or hold the yarn. I*

For mounting the different blades 9G, 9| and 92 on the blade carrier 51 in position, there is provided a` pivot bolt |95 passing through the nXed blades 9@ and 9| and a framepart ofthe blade carrier, and having an intermediate smooth section passing through the movable blade 92 with a snug rotative nt to serve as a pivot support for said latter blade.y v

A pin IE5 (Figs. 6 and 9) secured to a frame part of the blade carriergl. passesthrough the blades SQ andSIWith `a snug slide fit and cooperates thereby with thef pivotbolt |00 to fxedly support said blades `on said carrier. An intermediate section `of the pin `|05 passes through a hole |05 inthe movable .bladeSZ with enough clearance to permit angular movement of said blade about the axis of Vitspivot support |00.

The blades t0, 9| and 92 are yieldably pressed together by a bolt |03 passing through the blades 90 and 9| with a snug slide nt andvthrough the movable blade 92 with clearance and urged endwise by a coil spring |04 encircling a projecting part of said bolt.

For operating the movable blade Q2 in open or closed position with respect to the other blades ing a bearing in the plate II2, and an eccentric |22 between said head and said journal supporting the blade opening cam I I0 lfor free swinging movement. A nut I 23 is threaded on the projecting end of the bolt pin IIB to retain the pin against endwise movement and to lock said pin in rotative adjusted position.

The blade closing cam III is disposed above the course of -slide travel of the movable blade 92 and is supported on `a pin |30 to swing freely therefrom under the action of gravity and the action of the follower roller II1. The pin |30 is of the` eccentric type similar to that of the pin I I3 to permit the blade closing cam I I I to be.

The blade opening cam I0 is disposed in front of the blade closing cam I |I Ain relation to the loom and has anupper cam edge ISI inclined upwardly towards the rear of the loonnas shown in Figs. 3, 4, 5 and 6, when said cam hangs freely downwardly by gravity. A stop |32 on the plate I I2 limits counterclockwise rotation of the blade opening cam |I0, while the roller I|1 on the movable blade 92 is riding over its inclined cam edge I3I during the rearward movement of the blade carrier 51 towards the shuttle box I8 resulting from a pushing of the cable 66.

The blade closing cam I I has a lower cam edge |34 inclined upwardly towards the rear of the loom, as shown in Fig. 9, when said cam hangs freely downwardly by gravity. A stop |35 on V the plate II2 limits counterclockwise rotation of the blade closing cam III, while the roller II1 on the movable blade 92 is riding over its inclined cam edge |34 during forward movement; (towards the right in Fig. 9) of the blade carrier 51 resulting from the pushing action of the shutand SI at the proper time, there is provided "1 To permit substantiallyhorilz'ontal adjustments tleboX I8 on said blade carrier in its movement towards front center position, as will be described.

To move the blade carrier 51 in a forward direction (towards the right in Fig. 9) to close the blade 92 for thread cutting and clamping operations, the carrier has a lug I 31 (Figs. 1, 3, 4 and 5) into which isthreaded a stud |38 extending towards the shuttle box I8 on the lay I1. The head of the stud I 3 8 is in the path of forward movement of a bunter |39 on the front shuttle box plate 22 andwhen engaged thereby, as vshown in Fig. 4, the blade carrier 51 'is moved forwardly therewith to effect closing of the blade 92. The stud |38 can be adjusted on the blade carrier51'and is locked in an adjusted position bya nut |40. y

. n n Operation Although the operation of the thread cutting and clamping device is believed apparent from the K foregoing description, it is summarized herein.

During normal operation, when no transfer is indicated, the starting rod 30 is in inactive rotative position, and the feeler plunger 4| is in withdrawn position with respect to the shuttle box |8. During this normal operation, the cable operating arm 65 is in the position shown in dot .and dash lines in Fig. 2, and the blade carrier v51 will be in the withdrawn inactive position shown in Fig. 3, with the blade 92 in closed position, the cam follower roller ||1 in position forwardly beyond the lower cam I0, and said lower zlzen hanging downwardly and against the stop When transfer is indicated by filling feeler motion on the left side of the loom, the starting rod 30 is partially rotated, causing the shipper arm 45 I to swing angularly and the shuttle feeler plunger 4| to move into extended feeler position .shown in Fig. 1. At the same time, the arm 65,

through. the operation of the pivot shaft 46 of the shipper arm 45 will be shifted from the position shown in dot and dash lines in Fig. 2 to the position shown in full lines. This operation will push the cableV 56 and will cause thereby the lblade carrier 51 to be moved along the guide 58 towards the shuttle box I8 on the lay I1, as shown in Fig. 4, and towards the left, as shownin Fig. 6. While the blade carrier 51 is moving towards the shuttle box I8, the follower roller |I1 on the movable blade 92 riding over the inclined cam edge I3I of the lower cam ||0, causes said blade to move angularly counterclockwise (Fig. 6) about the pivot support into open position, as shown in dot and dash lines in Fig. 6. The cam ||0 is held against rotation during this operation by the stop |32. When the cam follower roller ||1 reaches the end of the inclined ,cam edge I3 it comes into engagement with the upper cam and swings that cam clockwise out of the way, as shown in full vlines in Fig. 6. The upper cam I|| swinging idlyclockwise as described does not move the blade 92 into closed position, since the pressure of the spring |04 prevents this. Y

The blade carrier 51 continues its movement towards the shuttle box I8 on the lay |1 (towards the left in Fig. 6), until the upper cam I I is freed and falls by gravity into position against the stop |35. While the blade carrier 51 is approximately ii the rearward position shown in Fig. 6 and the blade 92 is in the open position indicated, the lay |1 on its forward beat-up movement will cause the blades 90, 0| and 92 to pass through the openings 23 and 25 in the front shuttle box plate 22 and shuttle 2| respectively and to locate the filling end A between the movable blade 92 on the one side and the fixed blades 90 and 3| on the other side, as shown in Fig. 4. As the lay |1 continues its forward movement, the bunter Y|39 on the front shuttle box plate 22 engages the head of the stud |38, as shown in Fig. 5, and moves therewith the blade carrier 51 forwardly (towards the left in Fig. 5) along the guide 58, without disturbing the cable 6B. The lost-motion spring connection BI permits this forward move- Iment ofthe blade carrier 51.

As the blade carrier 51 moves forward with th'e`shu`ttle` bxuthegcafm follower roller ||1 ridingover the inclined'cam edge |34 of the upper calnwlll movesthe blade A92 angularly about its pivot supportiliohitoclosed position, as shown in Figs. 5 and 9.,4 This operation clamps the filling end between the blades 9| and 92 and cuts the filling end between the blades and S2. Immediately after the closing of the blade 92, the transfer vof a-reservebobbin from the hopper to the shuttle 2| and simultaneous ejection of the vexhausted bobbin through the box opening I9 takes place. t Y

The forward movement (towards the right in Fig. 9) of the blade carrier 51 is continued until the follower roller |,I1 clears the upper cam Ill and engages the lower'cam I I0. This lower cam ||0 swings idly clockwise (Fig. 9) about its pivot support I|0 as the follower roller |1 moves along said cam, until said roller moves beyond said cam into position shown in Fig. 3. The lower cam II0l released thereby will swing down by gravity against thes'top |32 in position to move the blade 92 intoopen position, upon the next transfer` indication.

After the lay` I1 reaches front center position, it begins its rearward movement, thereby causing 'the severed clamped end of the filling A to be pulled out'through the opening 23 in the front shuttle box plate 22 and to vbe withdrawn out of the range of theweaving instrumentalities. During this' rearward movement of the lay I1, the starting rod 30 isi'etrned to its normal rotative position;V1 This" causes the cable operating arm 65V to returnf'to the position shown in dot and dash lines in 'Fig'. f2; and the cable 66 to be pulled. The blade carrier 51 "is/thereby withdrawn into the inactivefinvvard-v position shown in Fig. 3, until the next transfer operation. While in this inoperative 'positiona'ndwhile the severed filling end is held between the closed blades 9| and 92, the filling' is'severed near the cloth selvage by theusual templethread cutter (not shown) and will be -relez'ijsedV fromsaid blades, when these bladesare agairi opened during the next thread cutting and clamping operation, upon the next indication of transfer.

'If afterY transfer isinitiated, the shuttle feeler plunger 4| is moved Aforward by an improperly boxed shuttlej'this revokes the call for transfer and alsoicauses the cable 65 through the arm 61, to return the'=blade"carrier 51 into inactive position shown'jin Fig. 3. A T'Wh'ilethe inventionhas been described with particular reference to a specific embodiment, it is to beunderstood that it is not to be limited thereto,lbut is to be construed broadly and restricted" solely "by 'the scope of thev appended claims. l i

What is claimed isz.

1. In a loo'm having a starting rod which is partially rotated when transfer is indicated, a bobbin transfer mechanism, a transmission between said starting rod and said transfer mechanism for initiatingithe operation of said transfer mechanism .upon partial rotation of said starting rod resulting from a transfer indication, a threadcuti'er,vv and a cable connection between fa movable p art of said transmission and said thread cutter for operating said thread cutter upon 4operation of said transfer mechanism. 'Y C Y" Y 2. In a"loomi having a starting rod which is partially rotated 'when transfer is indicated, a bobbin transfer mechanism including a shuttle feelerg ai'trafi's'x'rissinY between said starting rod and said shuttle feeler for actuating said shuttle feeler into operative position and including a shipper arm and a pivot shaft mounting said arm, a thread cutter, an arm secured to said pivot shaft, and a push-pull cable between said latter arm and said thread cutter, for operating said thread cutter upon operation'of said transfer mechanism.

3. In a loom having a lay with a shuttle box near the bobbin transfer side of said loom for receiving a shuttle, a shuttle feeler located in a region 'near one end of the shuttle when properly boxed,Y means for operating said shuttle feeler, a thread cutter located in a region near the other end of the shuttle when properly boxed, and a cable connection between a movable Part of Ysaid feeler operating means and said thread cutter for operating said thread cutterA upon operation of said shuttle feeler.

'4. In a loom having a lay, a bobbin transfer mechanism, a thread cutter including a blade carrier movable into and out of thread cutting position with respect to a boxed shuttle, a pair of relatively movable thread cutting blades on said carrier, a transmission between said transfer mechanism and said blade carrier for moving said carrier in one direction into operative cutting position with respect to the boxed shuttle automatically in accordance with the operation, of said transfer mechanism, said blade carrier being disposed in positionto be moved by the motion of said lay in the opposite direction after said blade carrier has been moved into operative position, said transmission including a cable and a lost-motion connection to `permit the movement of said blade carrier in said opposite direction without disturbing said cable, and means operatable bythe movement of said blade carrier in said opposite direction for moving said bladesl relative from open threadreceivingfposition into closed thread cutting position.

5. In a thread cutting mechanism for a loom having a lay supported shuttle box, a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out of operative position, a pair of thread cutting blades on said carrier, one of said blades being mounted for movement into and out of thread cutting position With respect to the other blade, cam means in the path of movement of said movable blade for operating said movable blade into and out of thread cutting position as said blade carrier is moved, and means mounting said cam means for positional adjustments of said cam means.

6. In a thread cutting mechanism for a loom having a lay supported box, the combination as described in claim 5, said mounting means permitting vertical and horizontal adjustments in the position of said cam means.

7. In a thread cutting mechanism for a loom having a lay supported shuttle box, a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out o1" operative position, a pair of thread cutting blades on said carrier, one of said blades being mounted for movement into and out of thread cutting position with respect to the other blade, a bracket, means supporting said bracket, and means supported on said bracket and disposed in the path of movement of said movable blade for operating said movable blade into and out of thread cutting position as said blade carrier is moved, said bracket supporting means being adjustable to permit ad- 10 justments in the position of said blade operating means with respect to said movable blade.

8. In a thread cutting mechanism for a loom having a laysupported shuttle box, a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out of operative position, a pair of thread cutting blades on said carrier, onen of said blades being mounted or movement into and out of thread cutting position with respect to the other blade, a bracket plate, means supporting said bracket plate for positional adjustment along one direction, means disposed in the path oi' movement oi' said movable blade for operating said movable blade into and out of thread cutting position as said blade carrier is moved, and means supporting said blade operating means on to said bracket plate for positional adjustment thereon along a direction crosswise of said first mentioned direction.

9. In a thread cutting mechanism for av loomv` having a lay supported shuttle box, a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out of operative position, a pair of thread cutting blades on said carrier, one o f said blades being mounted for movement into and out of thread cutting position with respect to the other blade, a bracket plate, elongated slot and bolt means for supporting said bracket plate on to said guiding means for horizontal adjustment, cams disposed in the path of movement of said movable blade for operating said movable blade into and out of thread cutting position. as said blade carrier is moved, and eccentric pivot means for supporting each of Said cams on to said bracket plate for vertical adjustment thereon lo. In a thread cutting mechanism-`for a 10.0111 having a lay supported shuttle b ox, `a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out of operative position, a pair of thread cutting blades on said carrier, one of said blades being mounted for movement into and out of thread cutting position with respect to the other blade, a member in the path of movement of said movable blade adapted to move said latter blade into open thread receiving position with respect to the other blade, as said blade carrier moves in one direction, and a separate member in the path of movement of said movable blade adapted to move said latter blade into thread cutting position with respect to the other blade, as said blade carrier moves in the opposite direction.

11. In a thread cutting and clamping mechanism for a loom having a lay supported shuttle box, a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out of operative position, a pair of blades fixedly mounted on said carrier, a third blade pivotally mounted on said carrier for movement into and out of thread cutting and clamping position with respect to said iixedly mounted blades, a cam in the path of movement of said movable blade towards said shuttle box for camming said movable blade into open thread receiving position with respect to the other blades, and a second cam in the path of movement of said movable blade away from said shuttle box for camming said movable blade into closed thread cutting and clamping position with respect to the other blades.

l2. In a thread cutting and clamping mechanism for a loom having a lay supported shuttle box, a blade carrier, means for guiding said carrier for movement towards and away from the shuttle box into and out of operative position, a pair of blades iixedly mounted on said carrier, a third blade pivotally mounted on said carrier for movement into and out of thread cutting and clamping position with respect to said xedly mounted blades, a cam follower mounted on said movable blade, a cam in the path of movement of said movable blade towards said shuttle box pivotally supported and having a cam surface over which said cam follower is adapted to ride when said blade carrier is moving towards said Shuttle box, to cam said movable blade into open thread receiving position with respect to the other blades, stop means for holding said cam against pivotal movement in one angular direction while said cam is moving said movable blade into open position with respect to the other blades, said cam being free to swing about its pivot axis in the opposite angular direction to permit said cam follower to move idly past said cam when said blade carrier is moved aWay from said shuttle box, a second cam in the path of movement of said movable blade away from said shuttle box pivotally supported and having a cam surface over which said cam follower is adapted to ride when said blade carrier is moving away from said Shuttle box, to cam said movable blade into closed thread cutting and clamping position with respect to the other blades, and stop means for holding said second cam against pivotal movement in one angular direction while said second cam is moving said movable blade into closed position with respect to the other blades, said second cam being free to swing about its pivot axis in the opposite angular direction to permit said cam follower to move idly past said second cam, when said blade carrier is moved towards said shuttle box.

13. In a thread cutting and clamping mech- 12 anism for a loom having a lay supported shuttle box, the combination as described in claim 12, comprising a bracket plate mounted on said guide, and an eccentric pin pivotally supporting each of said cams on said plate and adjustable to effect adjustments in the location of the pivot axis of each cam with respect to the other cam.

14. In a thread cutting and clamping mechanism for a loom having a lay supported shuttle box, the combination as described in claim 12, comprising a bracket plate mounted on said guide, said cams being pivotally mounted on said plate, and the cam follower carried by said movable blade being in the form of a roller.

15. In a thread cutting and clamping mechanism for a loom having a lay supported shutle box, a blade carrier having a slide head, a xed guide with a groove for receiving said head to guide said blade carrier in its movement towards and away from said shuttle box, thread cutting and clamping blades supported on said carrier and movable relatively into and out of thread cutting and clamping position, a cable attached to said blade carrier and operatable from a bobbin transfer mechanism to move said carrier towards and away from said shuttle box, and means operatable by the movement of said blade carrier for moving said blades relatively into or out of thread cutting and clamping position.

JOHN J STANLEY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,817,112 Turner Aug. 4, 1931 2,326,862 Irons Aug. 17, 1943 2,471,809 Beatrice May 31, 1949 2,515,045 Kielczewski et al. July 11, 1950 

